Transport Minister Stewart Stevenson said responsibility for this week's weather-related travel chaos lay with him, during a ministerial statement on 8 December 2010.
Mr Stevenson was making a statement after hundreds of motorists were stranded overnight after heavy snow brought chaos to main routes on 6 December.
On the M876 alone, 650 cars and 350 lorries became stuck on the five-mile stretch of road near Falkirk.
Some travellers were stuck in their vehicles for more than 15 hours as Scotland bore the brunt of the weather.
In his statement to parliament he put the problems down to a "perfect storm" of factors and said they were "exceptional circumstances".
He said the two big issues were fixing the immediate problem, and working out how to adjust if such extreme weather was to become more common.